Final answer:
Adolescents who do not consider crowd membership essential are called Outsiders. They maintain independence from traditional social groups and often have identities not tied to specific cliques.
Step-by-step explanation:
Adolescents who say that crowd membership is not that important to them are labeled as C) Outsiders. These individuals may not prioritize belonging to specific social cliques or groups and often maintain a degree of independence from traditional categorizations of adolescents within a school or social environment. The sense of identity for Outsiders is not heavily tied to a particular group, which is different from those who might identify as part of the in-group or actively seek to join exclusive circles like fraternities or sororities often seen as elites or populars.